Features:One hub light, powerful enough to light up the whole tyre.Not only for decoration, but also for safety through alert.Easy installation, simply fasten it on your bicycle tyre hub, no compromise to gravity of bike.Refreshing lamp light, perfectly used to decorate your cycling bike.3 Modes: Quick Flashing, Slow Flashing, Normally On.Side switch to control or turn it on/off.Look EXTRA COOL with it while biking espacially at night.